Protect are investigating after the discovery near to the entrance of Gosford House, East Lothian.
A fellow of the public contacted police after making the find in an area off the A198 at connected with 6.30pm on Sunday, close to the 19th century home.
A Police Scotland spokesman validated the remains were human and that the death is being treated as unexplained and are drudgery to identify them.
Detective Superintendent Pat Campbell said: “We are in the very antediluvian stages of this investigation, to recover the remains, identify the deceased and peach on their family, and establish the circumstances of the death.
“The recovery will be a painstaking manipulate and officers and scientific experts will be in the area doing this be employed over the coming days.
“I would not wish to cause any unnecessary angst to families or anyone who is waiting for news of a missing loved one and my officers pleasure be in contact with the next-of-kin of any person who becomes relevant to the investigation. The courtyard where the remains have been found, including the A198, when one pleases remain cordoned off while we conduct our inquiries.”
Gosford House is the 19th century instate of the Charteris family and open to the public in the summer months.
Built by the 7th Earl of Wemyss between 1790 and 1800, it was one of the terminating great architectural commissions of the celebrated architect Robert Adam.
Various recently, it starred in time-travel TV series Outlander, where it doubles for the fast block at the Palace of Versailles..